How to register TSF with Windows Desktop speech engine

Question

Here is my code to initialize and register with TSF:

::OleInitialize(NULL);

HRESULT hr=CoCreateInstance(CLSID_TF_ThreadMgr,NULL,CLSCTX_INPROC_SERVER,IID_ITfThreadMgr,(void **)&pThreadMgr);
if (FAILED(hr) || pThreadMgr==null) return;

hr=pThreadMgr->Activate(&ClientId);
if (FAILED(hr)) return;

hr=pThreadMgr->CreateDocumentMgr(&pDocumentMgr);
if (FAILED(hr) || pDocumentMgr==null) return;


pTextStore=new CTextStore();   // create my ITextStoreACP store

hr=pDocumentMgr->CreateContext(ClientId,0,reinterpret_cast<ITextStoreACP *>pTextStore,&pContext,&EditCookie);
if (FAILED(hr) || pContext==null) goto END;

hr=pDocumentMgr->Push(pContext);
if (FAILED(hr)) return;

At the end of this code, my TextStore interface gets the GetTextView,GetStatus and GetWnd calls. However, no calls are received to the SetText() or any other methods when I speak into the Microphone. The default dictation scratchpad shows up instead. I don't want the scratchpad to show up. I need the text to be routed to my TextStore. Do I need to register the TextStoreACP interface with speech engine? What am I missing here? Any ideas?

Answer 1

The application window needs to be specified as the focus window to the document manager:

pThreadMgr->AssociateFocus(hWnd, pDocumentMgr, &pPrevDocumentMgr);

After this call, TSF starts routing speech calls to the ITextStoreACP interface.